Characterization of the Bose-glass phase in low-dimensional lattices

Details Characterization of the Bose-glass phase in low-dimensional lattices Characterization of the Bose-glass phase in low-dimensional lattices

2010-03-05

arxiv.org/abs/1003.1235v1

Physical Review B 81, 195129 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

4+ epsilon pages and 4 figures

Scientific paper

We study by numerical simulation a disordered Bose-Hubbard model in low-dimensional lattices. We show that a proper characterization of the phase diagram on finite disordered clusters requires the knowledge of probability distributions of physical quantities rather than their averages. This holds in particular for determining the stability region of the Bose-glass phase, the compressible but not superfluid phase that exists whenever disorder is present. This result suggests that a similar statistical analysis should be performed also to interpret experiments on cold gases trapped in disordered lattices, limited as they are to finite sizes.

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